after the connecticut school shooting. walmart says it sold out of semi-automatic rifles in five states budding -- including pennsylvania, kansas and alabama. experts say some people fear it will be harder to buy guns if tougher gun control laws are passed. >>> first lady michelle obama wrote a letter to the residents of newtown, connecticut, titled holding you in our hearts. "as a mother of two young daughters, my heart aches for you and your families. like so many americans, i wish there were -- there was something, anything i could do or say to ease your anguish ." the gun violence tack force led by the vice president is already hard at work. janet napolitano and eric holder joined law enforcement leaders from across the country yesterday in washington, d.c. their goal is to create solid policy proposals for the president's push to change gun laws after the newtown, connecticut mass care. >>> the federal government wants to -- massacre. >>> the federal government wants to close down the harborside health center. it earn